[RFC PATCH v3 07/11] drm/xe: Stub out DRM pagemap IOVA alloc implementation

[Matthew Brost <matthew.brost@intel.com>]

Stub out the minimal set of DRM pagemap IOVA vfuncs required for Xe.
This provides the basic scaffolding needed for functionality while the
full implementation is developed.

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
---
 drivers/gpu/drm/xe/xe_svm.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_svm.c b/drivers/gpu/drm/xe/xe_svm.c
index 213f0334518a..eb8d8fe6ff75 100644
--- a/drivers/gpu/drm/xe/xe_svm.c
+++ b/drivers/gpu/drm/xe/xe_svm.c
@@ -1649,6 +1649,14 @@ int xe_svm_alloc_vram(struct xe_svm_range *range, const struct drm_gpusvm_ctx *c
 	return err;
 }
 
+static void *xe_drm_pagemap_device_iova_alloc(struct drm_pagemap *dpagemap,
+					      struct device *dev, size_t length,
+					      enum dma_data_direction dir)
+{
+	/* NIY */
+	return NULL;
+}
+
 static struct drm_pagemap_addr
 xe_drm_pagemap_device_map(struct drm_pagemap *dpagemap,
 			  struct device *dev,
@@ -1720,6 +1728,7 @@ static void xe_pagemap_destroy(struct drm_pagemap *dpagemap, bool from_atomic_or
 }
 
 static const struct drm_pagemap_ops xe_drm_pagemap_ops = {
+	.device_iova_alloc = xe_drm_pagemap_device_iova_alloc,
 	.device_map = xe_drm_pagemap_device_map,
 	.device_unmap = xe_drm_pagemap_device_unmap,
 	.populate_mm = xe_drm_pagemap_populate_mm,
-- 
2.34.1